InTime can synchronize your system time with an NTP server on the Internet.
License: Freeware
OS Support: WinXP, WinNT 4.x, WinME, Win Vista, Win98, Win95

Synchronizes PC's clock to atomic time server.
License: Shareware
OS Support: WinXP, WinNT 4.x, WinME, Win Vista, Win98, Win95

cmxSyncTime synchronizes your PC clock to the NIST internet servers.
License: Freeware
OS Support: WinXP

Monitors and logs your computer's clock compared to the TRUE time Time auditor.
License: Demo
OS Support: WinXP, WinNT 4.x, WinNT 3.x, Win Vista

Windows time server NTP, SNTP and GPS devices.
License: Commercial
OS Support: WinXP, WinNT 4.x, WinNT 3.x, Win Vista

shows the working time on your computer of the last 3 weeks graphically PC On/Off Time works with Windows Vista/XP.
License: Freeware
OS Support: WinXP, WinNT 4.x, Win2003, Win2000, Win Vista

Chronos Atomic Clock Synchronizer is a utility for people who need their computers to use exact time The program connects to various atomic clock timeservers and synchronizes your internal clock with time provided by theseservers.
License: Shareware
OS Support: WinXP, WinNT 4.x, WinNT 3.x, WinME, Win2003, Win2000, Win Vista, Win Vista, Win98, Win95, Linux Gnome

Absolute Time Corrector is an award-winning program, which allows you to synchronize your local PC time using NIST (National Institute of Standard Time) Internet Time Service or LAN time servers.
License: Shareware
OS Support: WinXP, WinNT 4.x, WinME, Win2003, Win2000, Win Vista, Win98, Win95

ATS is a full-featured time server, which works as windows service and is fully RFC-868 and RFC-2030 compatible Absolute Time Server acts as a background process, has very low system resources consumption, and it can be started before user logon.
License: Shareware
OS Support: WinXP, WinNT 4.x, Win2003, Win2000, Win Vista

Network Time System allows creation of network time server in corporate network environment establishing interconnected server time synchronization system for each and every machine on the enterprise network Supports NTP, SNTP, NTS protocols.
License: Shareware
OS Support: WinXP, WinNT 4.x, WinME, Win2003, Win2000, Win Vista, Win98, Win95